Paffard Keatinge-Clay studied architecture in London and engineering in Zurich. His mentor was Sigfried Giedion, and he worked in the office of Le Corbusier in Paris. He migrated to the United States as an apprentice to Frank Lloyd Wright and became a design architect for Skidmore, Owings and Merrill in Chicago, where he came to know Mies van der Rohe. He practiced in San Francisco for 15 years. His work of this period (including the 1969 San Francisco Art Institute Extension) reflects the lessons of his mentors but is also strong and innovative.

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